For reflection, refraction, and color mixing experiments. The light boxconsists of a light source 12 V, 24 W lamp, producing convergent,divergent or parallel beam. On one end, an adjustable cylindricalconvex lens (for parallel beam)On the other end, a triple aperture system for color mixing experiments(lateral aperture are provided with adjustable hinged mirror). Allapertures in the box are provided with vertical channels to hold slitplates and color filters. The optical set includes Acrylic Blocks, setof three mirrors, 2 slit black plates, one with three narrow slits atone end and one narrow slit at the other end. Another black plate withfour narrow slits at one end, one wide slit at the other end & setof seven mounted color.